Having neither the inclination nor the energy? (8)
I believe the answer is:
listless
'having neither' is the definition.
I can't tell whether this definition defines the answer.
'inclination nor the energy?' is the wordplay.
I cannot quite see how this works, but
'inclination' could be 'list' (list can mean to tilt, lean or incline) and 'list' is found within the answer.
'energy?' could be 'e' (physics symbol as in E=mc2) and 'e' is present in the answer.
This explanation may well be incorrect...
'the' acts as a link.
Can you help me to learn more?
(Other definitions for listless that I've seen before include "Short of energy (and ill-equipped for shopping?)" , "Low-spirited" , "'Lethargic, spiritless (8)'" , "disorganised on a shopping trip?" , "Lacking zest or enthusiasm" .)